Dwarf grapevine ‘VDG001’

ABSTRACT

The invention is a new and distinct ornamental dwarf grapevine variety denominated ‘VDG001’. The new grapevine is characterized by light to medium green leaf color, reddish petiole, smooth mature leaf surface, petiole sinus with closed lobes, circular mature leaf, some veins with anthocyanin coloration and green berries.

Latin name of the genus and species of the plant claimed: Vitisvinifera.

Variety denomination: ‘VDG001’.

BACKGROUND OF THE INVENTION

The new and distinct dwarf ornamental grapevine described and claimedherein originated from a cross between ‘Pixie’™×‘Riesling’.

The female parent ‘Pixie’™ is a natural dwarf ornamental grapevine(Vitis vinifera) derived from periclinal L1/L2 chimera ‘Pinot Meunier’with dark purple berry skin. ‘Pixie’™ is the only known naturally dwarfgrapevine in the public domain.

The pollen parent ‘Riesling’ is an early 15^(th) century Vitis viniferavariety from Germany.

The present variety of dwarf grapevine was first produced by controlledhybridization. The original cross was done at Vineland Research andInnovations Centre, Vineland Station, Ontario, Canada on Oct. 20, 2010.

‘VDG001’ was first successfully asexually propagated by single nodesoftwood cuttings at the Vineland Research and Innovations Centre,Vineland Station, Ontario, Canada on Jun. 8, 2012. It is beingmaintained on its own roots in a container in a Canadian Food InspectionAgency certified greenhouse facility at Vineland Research and InnovationCentre, Vineland Station, Ontario, Canada.

SUMMARY OF THE INVENTION

The new grapevine ‘VDG001’ has the following major distinguishingcharacteristics. Mature leaf in ‘VDG001’ is smaller than in ‘Pixie’™.Leaf color in ‘VDG001’ is light to medium green, whereas mature leaf isdark green in ‘Pixie’™. Petiole in ‘VDG001’ is reddish, whereas petioleis green in ‘Pixie’™. Mature leaf surface in ‘VDG001’ is smooth, whereasmature leaf surface has a prominent blistery texture in ‘Pixie’™.Petiole sinus in ‘VDG001’ has closed lobes, whereas petiole sinus hashalf overlapping lobes in ‘Pixie’™. Mature leaf in ‘VDG001’ has circularshape, whereas mature leaf has a pentagonal shape in ‘Pixie’™. ‘VDG001’has some veins with anthocyanin coloration, whereas in ‘Pixie’™ allveins are green.

The characteristics most useful in distinguishing ‘VDG001’ from ‘Pixie’™are young shoot: anthocyanin coloration of prostrate hairs on tip, youngleaf: prostrate hairs between main veins on lower side of blade, matureleaf: blistering of upper side of blade, mature leaf: depth of upperlateral sinuses, mature leaf: erect hairs on main veins on lower side ofblade, bunch: length of peduncle of primary bunch, and berry: color ofskin (without bloom).

BRIEF DESCRIPTION OF THE DRAWING

The accompanying photographic illustration illustrates in full color‘VDG001’. The colors are as nearly true as reasonably possible in colorrepresentation of this type. Colors in the photographs may differ fromthe color values cited in the detailed botanical description below,which accurately describes the colors of the new dwarf grapevine.

FIG. 1 shows habit and foliage color of ‘VDG001’, in comparison to thefemale parent ‘Pixie’™.

FIG. 2 shows upper side of mature leaf blade of ‘VDG001’, in comparisonto the female parent ‘Pixie’™.

FIG. 3 shows a magnified view of upper side of mature leaf blade of‘VDG001’, in comparison to the female parent ‘Pixie’™.

FIG. 4 shows upper side of young shoot of ‘VDG001’, in comparison to thefemale parent ‘Pixie’™.

FIG. 5 shows grape bunch size and density and berry color, size andshape of ‘VDG001’, in comparison to the female parent ‘Pixie’™.

DETAILED BOTANICAL DESCRIPTION OF THE INVENTION

‘VDG001’ is a dwarf ornamental grapevine with edible fruit. ‘VDG001’ hasinherited the undetermined growth pattern and the dwarf growth habitfrom the mother variety (‘Pixie’™). The internodes are 10-15 mm inlength (approximately 10-20 times shorter compared to standard Vitisvinifera cultivars). Genotypic lab analysis confirmed the hybrid statusof ‘VDG001’. Polymerase chain reaction (PCR) was performed on templateDNA extracted from ‘VDG001’ using microsatellite marker primers thatwere polymorphic between ‘Pixie’™ and ‘Riesling’. The microsatellitemarkers confirmed that the new variety ‘VDG001’ is a hybrid of theparents.

The variety is uniform and stable. No off-types, variants or mutationshave been found to date.

The R.H.S. Colour Chart of The Royal Horticultural Society has been usedfor colour identification of foliage, berry skin and shoot. Thedescription is based on the observation of 10 one year old plantsgrowing in containers on their own roots in a greenhouse facility atVineland Research and Innovation Centre, Vineland Station, Ontario,Canada during the years 2013 and 2015.

-   Time of bud burst: Not available as the plants were grown in a    greenhouse.-   Young shoot:    -   -   Openness of tip.—Closed.        -   Prostrate hairs on tip.—Dense.        -   Anthocyanin coloration on prostrate hairs on tip.—Medium.-   Young leaf:    -   -   Color of upper side of blade.—Green (137-C).        -   Prostrate hairs between main veins on lower side of            blade.—Medium to sparse.-   Shoot:    -   -   Color of dorsal side of internodes.—Green (139-B).        -   Color of ventral side of internodes.—Green (139-B).        -   Color of dorsal side of nodes.—Green (139-B).        -   Color of ventral side of nodes.—Green (139-B).        -   Length of tendril.—Very short (abort at length of 4-5 mm).-   Flower:    -   -   Sexual organs.—Fully developed stamens and fully developed            gynoecium.-   Inflorescence:    -   -   Type.—Hermaphrodite.        -   Date of bloom.—Continuous.        -   Flower cap.—5 fused, yellow green (146-B).        -   Flowers/cluster.—10-80.        -   Flower diameter.—2.2 mm.        -   Cluster length+peduncle.—2-3 cm.        -   Pistil length.—2.4 mm.        -   Pistil color.—Yellow green (146-B).        -   Filament length.—2 mm.-   Mature leaf:    -   -   Size of blade.—Small to very small.        -   Shape of blade.—Circular.        -   Blistering of upper side of blade.—Weak.        -   Number of lobes.—Three.        -   Depth of upper lateral sinuses.—Medium to shallow.        -   Arrangement of lobes of upper lateral sinuses.—Closed.        -   Arrangement of lobes of petiole sinus.—Slightly overlapped.        -   Length of teeth.—Medium to short.        -   Ratio length/width of teeth.—Medium.        -   Shape of teeth.—Mixture of both sides straight and both            sides convex.        -   Proportion of main veins on upper side with anthocyanin            coloration.—Absent or very low.        -   Prostrate hairs between main veins on lower side of            blade.—Sparse.        -   Erect hairs on main veins on lower side of blade.—Medium.        -   Length of petiole compared to length of middle vein.—Much            shorter.        -   Color of upper surface.—Yellow green (147-A).-   Time of beginning of berry ripening: Not available as the plants    were grown in a greenhouse.-   Bunch:    -   -   Size (peduncle excluded).—Very small.        -   Density.—Dense.        -   Length of peduncle of primary bunch.—Short.-   Berry:    -   -   Size.—Small.        -   Shape.—Globose.        -   Color of skin (without bloom).—Green (144-B, Also the berry            is slightly russet).        -   Ease of detachment from pedicel.—Difficult.        -   Thickness of skin.—Medium.        -   Anthocyanin coloration of flesh.—Absent or very weak.        -   Firmness of flesh.—Soft or slightly firm.        -   Particular flavor.—None.        -   Formation of seeds.—Complete.-   Woody shoot:    -   -   Main color.—Orange brown (175-C).-   Other: The petiole of ‘VDG001’ has some anthocyanin pigmentation,    while the one in ‘Pixie’™ is green. ‘VDG-001’ has no particular    resistance to any disease or insects and its susceptibility to    disease and insects is similar to that of the female parent    “Pixie”™.

Biometric data of ‘VDG001’ is compared to that of the mother variety(‘Pixie’™) in Table 1.

TABLE 1 Biometric data ‘VDG001’ ‘Pixie’ ™ Average size of mature leafblade, L × W, mm 94 × 93 106 × 107 Length of petiole/length of mainvein, mm 36/64 42/77 Height of central stem, cm 108 98 Total lineargrowth per plant, cm 108 150 Total number of nodes per plant 82 117Average internode size, mm 13 13 First bunch set at node number 39 25Average peduncle length, mm 26.7 40.5 Average number of berries perbunch 10.0 21.6 Average bunch weight, g 16.5 18.9 Average berry weight,g 1.7 0.9 Average berry size, mm 13.7 12.7 Average number of seeds/berry3.0 2.7 Sugar content, °Bx 20.2 21.3

The ‘VDG001’ variety has not been observed under all possibleenvironmental conditions to date. Accordingly, it is possible that thephenotypic expression may vary somewhat with changes in light intensityand duration, cultural practices, and other environmental conditions.

What is claimed:
 1. A new and distinct variety of dwarf ornamentalgrapevine substantially as herein illustrated and described.